CN114593634B - Electromagnetic linear propulsion experiment platform capable of adjusting initial speed of emission and experiment method - Google Patents
Electromagnetic linear propulsion experiment platform capable of adjusting initial speed of emission and experiment method Download PDFInfo
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- CN114593634B CN114593634B CN202210299516.5A CN202210299516A CN114593634B CN 114593634 B CN114593634 B CN 114593634B CN 202210299516 A CN202210299516 A CN 202210299516A CN 114593634 B CN114593634 B CN 114593634B
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- 238000002474 experimental method Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 7
- 239000003990 capacitor Substances 0.000 claims abstract description 34
- 229920001342 Bakelite® Polymers 0.000 claims abstract description 15
- 239000004637 bakelite Substances 0.000 claims abstract description 15
- 238000007599 discharging Methods 0.000 claims description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 6
- 239000011810 insulating material Substances 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
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- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000002679 ablation Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000007769 metal material Substances 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000010304 firing Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
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- 239000000919 ceramic Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A31/00—Testing arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
- F41B6/00—Electromagnetic launchers ; Plasma-actuated launchers
- F41B6/006—Rail launchers
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Abstract
The invention discloses an adjustable initial speed electromagnetic linear propulsion experimental platform and an experimental method, wherein the adjustable initial speed electromagnetic linear propulsion experimental platform comprises a capacitor bank, an electromagnetic linear propulsion device, a control system and an initial speed adjusting device; the capacitor bank is formed by connecting a plurality of capacitors in parallel and is connected with an electromagnetic linear propulsion device consisting of a cuboid guide rail, an armature and a bakelite bottom plate; the control system comprises a first loop, a second loop and a second switch; the initial speed adjusting device comprises a loop III, a gear, a hollow tube, a rectangular plate, an insulating rectangular plate, a propelling rail and a conductive block which are connected in sequence; the invention provides an electromagnetic linear propulsion experimental platform with adjustable initial emission speed and an experimental method, which can effectively adjust the initial emission speed of an armature during electromagnetic emission.
Description
Technical Field
The invention relates to the technical field of electromagnetic emission, and provides an electromagnetic linear propulsion experimental platform with adjustable initial speed of emission and an experimental method.
Background
The working principle of the linear propulsion mechanism is manufactured according to the law of electromagnetic induction in physics. The two tracks are parallel to each other, the launching assembly slides along the axial direction of the tracks, the armature is derived from a direct current motor, the armature is used for transmitting current between the two tracks and receiving the action of Lorentz force, and the projectile is pushed to do acceleration motion towards the muzzle, so that electromagnetic energy is converted into kinetic energy.
The track and the armature are core components in electromagnetic firing, and during the firing of an electromagnetic track gun, the track plays the roles of conducting current and guiding the armature and the projectile. In order to ensure good contact of the circuit, the rail is tightly contacted with the armature, the high-speed sliding electric contact process is performed during emission, the amplitude of current flowing in the rail is large, and the temperature of the surface of the rail is high due to megaampere current, so that the rail is made of wear-resistant and ablation-resistant metal materials. In the launching process, the electrified track is in a high-strength magnetic field and is subjected to outward repulsive force, and in order to prevent the track from deforming, a protection device is used for fixing and supporting the track.
After the current flows through the armature and the guide rail, a repulsive force is generated between the armature and the guide rail. A transition occurs when the repulsive force generated between the armature and the guide rail exceeds the applied contact force. By providing sufficient contact pressure between the armature and rail, ablation can be effectively inhibited. Studies have shown that damage indicating the start of the track after multiple shots is the most important factor affecting the life of the track. A critical thermal stress zone exists near the start of the track. This is because the armature speed is low at the rail start position, and the heat is accumulated on the rail for a long time relative to the high speed Duan Dianzu, and a large amount of heat vaporizes aluminum.
Aiming at the research of the damage problem of the initial position of the current electromagnetic emission track, an adjustable initial speed linear propulsion experimental platform is built, and experimental conditions are provided for the follow-up exploration of the influence of the initial speed of emission on armature-track ablation.
Disclosure of Invention
The invention aims to linearly advance an experimental platform, provides a device and an experimental method for adjusting the initial firing speed of an armature, and provides experimental conditions for the follow-up exploration of the influence of the initial firing speed on armature-rail ablation.
The technical scheme of the invention is as follows: an adjustable initial speed electromagnetic linear propulsion experiment platform and an experiment method, wherein the adjustable initial speed electromagnetic linear propulsion experiment platform comprises a capacitor bank, an electromagnetic linear propulsion device, a control system, an initial speed adjusting device and a trigger circuit; the capacitor bank is formed by connecting a plurality of capacitors in parallel; each capacitor has a capacity of 0.8mF, a total of 3.2mF, chargeable to 10kV; connecting an electromagnetic linear propulsion device;
The electromagnetic linear propulsion device consists of a cuboid guide rail, an armature and an bakelite bottom plate; the main material of the cuboid-shaped guide rail is copper, the armature material is aluminum alloy, the bakelite bottom plate has a certain thickness, the insulation distance between the bakelite bottom plate and the ground is ensured, and the insulation distance is generally more than 2cm; the two cuboid-shaped guide rails are ensured to be parallel, the distance between the two cuboid-shaped guide rails is 2cm, and the two cuboid-shaped guide rails and the bakelite base plate are fixed together; the armature is U-shaped, and the tail part of the armature is surplus, so that initial contact pressure is provided for the cuboid-shaped guide rail and the armature;
The control system consists of a first loop, a second loop and a second switch; the device is used for controlling the discharging of the capacitor bank and the operation of the initial speed adjusting device; the first loop consists of a switch III, a power supply III, a time relay electromagnetic and delay part, a normally closed switch electromagnetic and delay part, a rectangular plate and a conductive block which are connected in series;
the second loop is formed by serially connecting a time sequence discharging switch, a first power supply and a time relay contact part;
The time sequence discharging switch is connected with the capacitor bank, the cuboid-shaped guide rail and the armature to form a loop, the time sequence discharging switch comprises a plurality of groups of time relays, and time sequence discharging of the capacitor bank to the electromagnetic linear propulsion device is completed by setting action time; the width of the rectangular plate is equal to the interval between the cuboid guide rails;
The initial speed adjusting device consists of a loop III, a gear, a hollow tube, a rectangular plate, an insulating rectangular plate, a propelling rail and a conductive block; the initial speed adjusting device is arranged at the initial position of the electromagnetic linear propulsion device and is used for providing a movement initial speed for an armature of the electromagnetic linear propulsion device before the capacitor bank discharges to the electromagnetic linear propulsion device.
The loop III comprises a motor, a switch II, a power supply II, a sliding resistor and a normally closed switch contact which are connected in series;
The two propulsion tracks are made of insulating materials, such as glass, bakelite and the like, are parallel, have the same interval as that of the cuboid-shaped guide rails, are fixed with the bakelite bottom plate, have one end respectively connected with the two cuboid-shaped guide rails of the electromagnetic linear propulsion device, have the same cross section as that of the cuboid-shaped guide rails, are arranged at a position close to the connection part, have the same thickness as that of the propulsion tracks, and are used for conducting a first loop when the rectangular plate moves;
The second power supply is used for providing controllable power for the motor, so that the motor drives the gear to rotate and forwards pushes the hollow tube connected with the gear; the hollow tube is connected with a rectangular plate, and the insulating rectangular plate is arranged at the front head of the rectangular plate.
When the armature needs to be propelled at different initial speeds, the motor drives the gear to rotate at different rotation speeds; when the gear rotates, the hollow tube is driven to advance; the rectangular plate is arranged in front of the hollow tube; the trigger circuit consists of a time relay and a power supply III;
the rectangular plate is preferably made of metal materials such as copper, iron, aluminum and the like, and the width of the rectangular plate is equal to the interval between the rectangular guide rails;
the insulating rectangular plate is preferably made of insulating materials, such as ceramics, glass and the like, and the width of the insulating rectangular plate is larger than or equal to the sum of the width of the conductive block and the insulating distance between the conductive block and the cuboid-shaped guide rail, so that the armature is ensured to enter the middle of the two cuboid-shaped guide rails when the capacitor discharges;
The conductive block is made of metal materials, such as copper, iron, aluminum and the like, the tail of the conductive block is embedded into the tail end of the propelling rail, a certain insulation distance is reserved between the conductive block and the cuboid guide rail, an energizing loop is formed by the conductive block, the time relay, the power supply III and the rectangular plate, when the rectangular plate moves to the conductive block, the loop is energized, and the thickness of the loop is consistent with that of the propelling rail;
the motor is preferably a 220V high-power direct current motor, and is used as an energy source of the initial speed adjusting device;
The gear is preferably of a type matched with the motor, and a rack of the gear is matched with a rack on the hollow tube;
The hollow tube is made of insulating materials, such as glass, plastic or nylon materials, and the outer surface of the hollow tube is carved with racks matched with the racks;
the experimental method comprises the following steps:
1) Checking an experimental loop, and continuing the experiment if the experimental loop is normal; the time relay electromagnetic and delay time of the delay part is set to zero, the normally closed switch electromagnetic and delay time of the delay part is set to zero, and a plurality of time relays of the time sequence discharging switch are respectively set to t 1,t2…,tn.
2) The armature is placed at the initial position of the propelling track, and the tail of the armature abuts against the insulating rectangular plate;
3) The initial speed adjusting device is arranged at the transmitting position of the electromagnetic linear propulsion device and is fixed on the ground;
4) Closing the first switch, the second switch and the third switch to enable the first power supply, the second power supply and the third power supply to be connected into the loop;
5) The second power supply supplies power to the motor to drive the gear to rotate; when the gear rotates, the hollow tube and the rectangular plate are driven to move forwards;
6) The sliding resistance is adjusted to change the motor rotating speed w 0, and the forward moving speed of the armature is v 0;
7) When the rectangular plate moves to the conducting block, the loop I is electrified, at the moment, the armature enters the transmitting position of the electromagnetic linear propulsion device, the time relay contact is partially closed, the normally closed switch contact is opened, the initial speed adjusting device exits the loop, and at the moment, the armature enters the electromagnetic linear propulsion device at the initial speed v 0;
8) The contact part of the time relay is closed, so that the second loop is conducted, the power supply supplies power to the time sequence discharging switch, the time sequence discharging switch acts, and the capacitor bank discharges power to the electromagnetic linear propulsion device;
9) Disconnecting the first switch, the second switch and the third switch;
10 The sliding resistance is regulated, the experimental steps 1) to 9) are repeated, and electromagnetic linear propulsion experiments with different initial transmission speeds can be realized;
The invention has the beneficial effects that: the electromagnetic linear propulsion experimental platform is used for researching the damage mechanism and protection technology of arc ablation on metal materials, but the arc ablation has a plurality of influencing factors on the damage of the metal materials. The initial speed of the emission is an important influencing factor, but few people build an electromagnetic linear propulsion experiment platform for changing the initial speed to study the influence of the initial speed of the emission on the ablation of the sliding arc. The invention provides a solution to the problem of providing an electromagnetic linear propulsion experimental platform and an experimental method with adjustable initial speed of emission, and the ablation condition under different initial speeds of emission is observed by adjusting the initial speed of emission.
Drawings
FIG. 1 is a block diagram of an adjustable launch initiation speed electromagnetic linear propulsion experiment platform of the present invention.
Fig. 2 is a diagram of a connection of an electric power line of an adjustable initial speed electromagnetic linear propulsion experimental platform.
Fig. 3 is a fixed structure diagram of a guide rail and an bakelite bottom plate of the adjustable initial speed electromagnetic linear propulsion experimental platform.
Fig. 4 is a diagram showing the armature shape of an adjustable launch initial velocity electromagnetic linear propulsion test platform according to the present invention.
FIG. 5 is a propulsion orbit diagram of an adjustable launch initial velocity electromagnetic linear propulsion experiment platform according to the present invention.
FIG. 6 is a cross-sectional view of a hollow tube of an adjustable launch initiation speed electromagnetic linear propulsion experiment platform of the present invention.
Detailed Description
The invention will be further described with reference to the drawings and examples.
As shown in figure 1, the adjustable initial speed electromagnetic linear propulsion experimental platform comprises a capacitor bank 1, an electromagnetic linear propulsion device 2, a control system 3 and an initial speed adjusting device 4;
fig. 2 is a diagram of the power circuit connection of the present invention, from which it can be seen that the capacitor bank 1 is formed by a plurality of capacitors connected in parallel; each capacitor is connected with the time relay 3011 in series, and the action time of each capacitor is set according to the experiment requirement; each capacitor has a capacity of 0.8mF, a total of 3.2mF, chargeable to 10kV; two ends of the capacitor bank 1 are connected with two ends of the electromagnetic linear propulsion device 2 through a time sequence discharging switch 3021; the electromagnetic linear propulsion device 2 consists of a cuboid guide rail 201, an armature 202 and an bakelite bottom plate 203; the main material of the cuboid-shaped guide rail 201 is copper, the armature 202 is made of aluminum alloy, the bakelite bottom plate 203 has a certain thickness, the insulation distance with the ground is ensured, the insulation distance is generally greater than 2cm, and the armature and the cuboid-shaped guide rail 201 are fixed together; the fixing mode is shown in fig. 3, and a cylindrical iron block 204 and a long screw 205 are used for parallel fixing on a bakelite base plate 203; the armature 202, as shown in fig. 4, is in a U-shape, the mouth of the U-shape is in an outward expansion design, that is, a tangent line at the outer edge of the mouth end of the U-shape and the outer wall of the U-shape form an included angle, which provides initial contact pressure for the cuboid-shaped guide rail 201 and the armature 202, the included angle ranges from 0.5 ° to 5 °, and the bottom of the U-shape is the front end in the moving direction; the experiment was placed in the start position of the propulsion track 406 before the start of the experiment;
The control system 3 consists of a first loop 301, a second loop 302 and a second switch 4012; for controlling the discharge of the capacitor bank 1 and the operation of the initial speed adjusting device 4;
the first loop 301 is formed by connecting a switch III 3011, a power supply III 3012, a time relay 304 electromagnetic and delay part 3013, a normally closed switch 305 electromagnetic and delay part 3014, a rectangular plate 404 and a conductive block 4061 in series;
the second loop 302 is formed by serially connecting a time sequence discharging switch 3021, a first switch 3022, a first power source 3023 and a contact part 3024 of the time relay 304;
The time sequence discharging switch 3021 is connected with the capacitor bank 1, the cuboid-shaped guide rail 201 and the armature 202 to form a loop, the time sequence discharging switch 3021 comprises a plurality of groups of time relays 30211, and time sequence discharging of the capacitor bank 1 to the electromagnetic linear propulsion device 2 is completed by setting action time; the width of the rectangular plate 404 is equal to the interval between the cuboid-shaped guide rails 201;
the initial speed adjusting device 4 consists of a loop III 401, a gear 402, a hollow tube 403, a rectangular plate 404, an insulating rectangular plate 405, a propulsion track 406 and a conductive block 4061; the initial speed adjusting device 4 is placed at the initial position of the electromagnetic linear propulsion device 2, and is used for providing a movement initial speed for the armature 202 of the electromagnetic linear propulsion device 2 before the capacitor bank 1 discharges to the electromagnetic linear propulsion device 2.
The third circuit 401 comprises a motor 4011, a second switch 4012, a second power supply 4013, a sliding resistor 4014 and a normally-closed switch 305 contact 4015 which are connected in series; fig. 5 is a diagram of two pushing rails 406, the number of the pushing rails 406 is two, the pushing rails are made of insulating materials, the two pushing rails 406 are parallel, the space between the pushing rails is consistent with the space between the rectangular guide rails 201, the pushing rails are fixed with a bakelite base plate, one ends of the pushing rails are respectively connected with the two rectangular guide rails 201 of the electromagnetic linear pushing device, the cross section of the pushing rails is the same as that of the rectangular guide rails 201, the conductive blocks 4061 are arranged at positions close to the connection parts, the thickness of the conductive blocks is consistent with that of the pushing rails 406, and the conductive blocks are used for conducting the first circuit 301 when the rectangular plate 404 moves;
The second power supply 4013 is configured to provide controllable power for the motor 4011, so that the motor 4011 drives the gear 402 to rotate, and pushes the hollow tube 403 connected to the gear 402 forward; the hollow tube 403 is connected with a rectangular plate 404, and an insulating rectangular plate 405 is arranged in front of the rectangular plate 404 to isolate the armature 202 from the rectangular plate 404;
Figure 6 is a cross-sectional view of a hollow tube. As can be seen from the figure, the inside is hollow and the outer surface is carved with a rack matched with the gear rack; before the experiment starts, the sliding resistance 4014 is adjusted to the maximum, at the moment, the switch II 4012 is closed, the power supply II 4013 is connected into a loop, the motor rotates, at the moment, the rotating speed is minimum, and the rotating speed is set to be w 0; if the radius is R, the linear speed is v 0＝w0. R; the space-time tube 403 pushes the rectangular plate 404, insulating rectangular plate 405 and armature 202 forward at a speed v 0; when the armature 202 needs to be propelled at different initial speeds, the sliding resistor 4014 is adjusted, and the motor 4011 drives the gear 402 to rotate at different rotation speeds; when the rectangular plate 404 moves forward and contacts the conductive block 4061, the time relay 304, the power supply III 3012 and the rectangular plate 404 form an energizing circuit, and at the moment, the normally closed switch 305 and the time relay 304 act to adjust the action time of the time relay 304 to zero; after the normally closed switch 305 acts, a third circuit 401 consisting of the motor 4011, the second power supply 4013, the second switch 4012, the sliding resistance 4014 and the normally closed switch 305 is powered off, and the motor stops rotating; while the motor stops rotating, the second loop 302 starts to run and the capacitor bank 1 discharges as the time relay 304 electromagnetic and delay part 3013 acts;
the experimental method comprises the following steps:
1) Checking an experimental loop, and continuing the experiment if the experimental loop is normal; the delay time of the electromagnetic and delay section 3013 of the time relay 304 is set to zero, the delay time of the electromagnetic and delay section 3014 of the normally closed switch 305 is set to zero, and the plurality of time relays 30211 of the time-series discharge switch 3021 are respectively set to t 1,t2…,tn.
2) The armature 202 is placed in the starting position of the propulsion track 406 with its tail abutting against the insulated rectangular plate 405;
3) The initial speed adjusting device 4 is arranged at the transmitting position of the electromagnetic linear propulsion device 2 and is fixed on the ground;
4) Closing a first switch 3022, a second switch 4012 and a third switch 3011, and connecting a first power supply 3023, a second power supply 4013 and a third power supply 3012 into a loop;
5) A second power supply 4013 supplies power to the motor 4011 to drive the gear 402 to rotate; when the gear 402 rotates, the hollow tube 403 and the rectangular plate 404 are driven to move forward;
6) Adjusting the sliding resistor 4014 to change the motor rotation speed w 0, wherein the forward moving speed of the armature is v 0;
7) When the rectangular plate 404 moves to the conductive block 4061, the first loop 301 is electrified, the armature 202 enters the transmitting position of the electromagnetic linear propulsion device 2, the contact part 3024 of the time relay 304 is closed, the contact 4015 of the normally closed switch 305 is opened, the initial speed adjusting device 4 exits the loop, and the armature 202 enters the electromagnetic linear propulsion device at an initial speed v 0;
8) The contact part 3024 of the time relay 304 is closed, so that the second loop 302 is conducted, the first power supply 3023 supplies power to the time sequence discharging switch 3021, the time sequence discharging switch 3021 acts, and the capacitor bank 1 discharges to the electromagnetic linear propulsion device 2;
9) Switch one 3022, switch two 4012, and switch three 3011 are turned off;
10 Sliding resistance 4014 is regulated, and the experiment steps 1 to 9 are repeated, so that electromagnetic linear propulsion experiments with different initial transmission speeds can be realized.
Claims (2)
1. The electromagnetic linear propulsion experimental platform capable of adjusting the initial speed of emission is characterized by comprising a capacitor bank (1), an electromagnetic linear propulsion device (2), a control system (3) and an initial speed adjusting device (4);
The capacitor bank (1) is connected with the electromagnetic linear propulsion device (2);
The electromagnetic linear propulsion device (2) comprises a cuboid guide rail (201) and an armature (202), wherein the armature (202) moves between two parallel cuboid guide rails (201) made of conductive materials;
The armature (202) is in a U-shaped shape, the opening part of the U-shaped is in an outward expansion design, namely, a tangent line of the outer edge of the opening end of the U-shaped is in an included angle design with the outer wall of the U-shaped, initial contact pressure is provided for a cuboid guide rail (201) and the armature (202), the included angle range is 0.5-5 degrees, and the bottom of the U-shaped is the front end in the moving direction;
the electromagnetic linear propulsion device (2) further comprises a bakelite base plate (203), wherein the bakelite base plate (203) has a thickness larger than 2cm so as to ensure the insulation distance with the ground;
The control system (3) is used for controlling the discharge of the capacitor bank (1) and the operation of the initial speed adjusting device (4);
the control system (3) comprises a first loop (301), a second loop (302) and a second switch (4012);
the first loop (301) comprises a switch III (3011), a power III (3012), a time relay (304) electromagnetic and time delay part (3013), a normally closed switch (305) electromagnetic and time delay part (3014), a conductive block (4061) and a rectangular plate (404) which are connected in series;
The second loop (302) comprises a time sequence discharging switch (3021), a first switch (3022), a first power supply (3023) and a contact part (3024) of a time relay (304) which are connected in series;
Meanwhile, the time sequence discharging switch (3021) is connected with the capacitor bank (1), the cuboid-shaped guide rail (201) and the armature (202) to form a loop;
The time sequence discharging switch (3021) comprises a plurality of groups of time relays (30211), and the time sequence discharging of the capacitor group (1) to the electromagnetic linear propulsion device (2) is completed by setting the action time;
The initial speed adjusting device (4) comprises a loop III (401), a gear (402), a hollow tube (403), a rectangular plate (404) and an insulating rectangular plate (405) which are sequentially connected, and further comprises a pushing track (406) and a conductive block (4061): the propulsion tracks (406) are two made of insulating materials and are respectively connected with the two cuboid guide rails (201) of the electromagnetic linear propulsion device in the length direction; the rectangular plate (404) is made of conductive materials, the rectangular plate (404) and the insulating rectangular plate (405) are arranged between the two pushing tracks (406), the width of the rectangular plate (404) is equal to the distance between the two pushing tracks (406), and the insulating rectangular plate (405) is used for isolating the rectangular plate (404) and the armature (202); the conductive block (4061) is arranged in a groove on the pushing track (406) and is separated from the connecting part of the pushing track (406) and the cuboid-shaped guide rail (201) by a distance gap; the hollow tube (403) is arranged on a central line extension line between the two propulsion tracks (406); the third loop (401) is used for providing power for rotation of the gear (402), so that the hollow tube (403), the rectangular plate (404) and the insulating rectangular plate (405) are driven to move, and finally, the armature (202) is pushed and given an initial movement speed; the initial speed adjusting device (4) is used for providing a movement initial speed for an armature (202) of the electromagnetic linear propulsion device (2) before the capacitor bank (1) discharges to the electromagnetic linear propulsion device (2);
The third loop (401) comprises a motor (4011), a second switch (4012), a second power supply (4013), a sliding resistor (4014) and a contact (4015) of a normally closed switch (305) which are connected in series;
The motor (4011) is connected with the gear (402) and a contact (4015) of the normally closed switch (305) at the same time;
The hollow tube (403) is made of insulating materials, the inside of the hollow tube is hollow, racks matched with the racks and the gears are carved on the outer surface of the hollow tube, and a connecting wire of the first loop (301) penetrates through the inside of the hollow tube (403) to connect the third switch (3011) with the rectangular plate (404);
the width of the insulating rectangular plate (405) is not smaller than the distance between the conducting block (4061) and the connecting part of the pushing track (406) and the cuboid-shaped guide rail (201), so that when the first loop (301) is communicated, the armature (202) is pushed onto the cuboid-shaped guide rail (201);
The pushing track (406) and the cuboid-shaped guide rail (201) are fixed on the bakelite base plate (203) through a cylindrical iron block (204) and a long screw (205);
The cross section of the pushing track (406) is the same as that of the cuboid-shaped guide rail (201);
The grooves on the pushing track (406) are holes penetrating through the bottoms of the pushing track (406) so that the first circuit (301) is conducted when the rectangular plate (404) moves to be in contact with the conductive blocks (4061) in the grooves.
2. The method for adjusting the initial speed of the electromagnetic linear propulsion experiment platform is characterized in that the electromagnetic linear propulsion experiment platform for adjusting the initial speed of the electromagnetic linear propulsion experiment platform is used, an armature (202) is firstly placed between two propulsion tracks, a gear (402) is rotated through a loop III (401), the rotating gear (402) drives a hollow pipe (403) to move, a rectangular plate (404) and an insulating rectangular plate (405) connected with the hollow pipe are pushed to move along with the hollow pipe, and the armature (202) is pushed to move towards a rectangular guide rail (201): when the rectangular plate (404) is in contact with the conductive block (4061), the control system controls the initial speed adjusting device (4) to stop working, and simultaneously controls the capacitor bank (1) to discharge to the electromagnetic linear propulsion device (2) so that the armature (202) continues to operate on the basis of the previous initial speed;
The method for adjusting the initial speed of the electromagnetic linear propulsion experimental platform comprises the following steps:
1) Checking an experimental loop, and continuing the experiment if the experimental loop is normal; setting the delay time of an electromagnetic and delay part (3013) of a time relay (304) to zero, setting the delay time of an electromagnetic and delay part (3014) of a normally closed switch (305) to zero, and setting a plurality of time relays (30211) of a time sequence discharging switch (3021) to t 1,t2…,tn respectively;
2) Placing the armature (202) in a starting position of the propulsion track (406) with its tail abutting against the insulating rectangular plate (405);
3) The initial speed adjusting device (4) is arranged at the transmitting position of the electromagnetic linear propulsion device (2) and is fixed on the ground;
4) Closing the first switch 3022, the second switch 4012 and the third switch 3011 to enable the first power supply 3023, the second power supply 4013 and the third power supply 3012 to be connected into a loop;
5) A second power supply 4013 supplies power to the motor 4011 to drive the gear 402 to rotate, and the hollow tube 403 and the rectangular plate 404 are driven to move forwards when the gear 402 rotates;
6) Adjusting a sliding resistor (4014) to change the motor rotating speed w 0, wherein the forward moving speed of the armature is v 0;
7) When the rectangular plate (404) moves to the conductive block (4061), the first circuit (301) is electrified, at the moment, the armature (202) enters the emission position of the electromagnetic linear propulsion device (2), the contact part (3024) of the time relay (304) is closed, the contact (4015) of the normally closed switch (305) is disconnected, the initial speed adjusting device (4) exits the circuit, and at the moment, the armature (202) enters the electromagnetic linear propulsion device at the initial speed v 0;
8) The contact part (3024) of the time relay (304) is closed, the second loop (302) is conducted, the first power supply (3023) supplies power to the time sequence discharging switch (3021), the time sequence discharging switch (3021) acts, and the capacitor bank (1) discharges to the electromagnetic linear propulsion device (2);
9) Opening switch one (3022), switch two (4012) and switch three (3011);
10 Sliding resistance (4014) is regulated, and the experimental steps 1) to 9) are repeated, so that electromagnetic linear propulsion experiments with different initial transmission speeds can be realized.
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| CN111076607A (en) * | 2019-11-22 | 2020-04-28 | 浙江大学 | Rail-mounted electromagnetic gun material performance test platform |
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| CN112881223A (en) * | 2021-01-18 | 2021-06-01 | 中国人民解放军海军工程大学 | Sliding contact and frictional wear characteristic test platform for electromagnetic rail transmitter |
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| US5024137A (en) * | 1989-11-13 | 1991-06-18 | Schroeder Jon M | Fuel assisted electromagnetic launcher |
| US7409900B1 (en) * | 2006-11-02 | 2008-08-12 | United States Of America As Represented By The Secretary Of The Navy | Rails for electromagnetic hypervelocity launcher |
| CN110631413A (en) * | 2019-08-30 | 2019-12-31 | 南京理工大学 | Electromagnetic gun with guide rail and rifling combined in segmented mode |
| CN110793387A (en) * | 2019-10-29 | 2020-02-14 | 中国人民解放军陆军装甲兵学院 | Electromagnetic thrust launching device |
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